<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

    <script>

        // g  全局匹配    global
        // i  忽略大小写  ignore


        var reg = /god/i ;   // god   GOd

        console.log(reg.test('GOd'));

    </script>
    
</body>
</html>